private void button4_Click(object sender, EventArgs e)
{
BigInteger cypherText;
BigInteger.TryParse(richTextBox7.Text, out cypherText);
BigInteger p, q, exp;
BigInteger.TryParse(richTextBox1.Text, out p);
BigInteger.TryParse(richTextBox2.Text, out q);
BigInteger.TryParse(richTextBox3.Text, out exp);
KeysPair keys = new KeysPair(p, q, exp);
BigInteger text = keys.decrypt(cypherText);
richTextBox8.Text = text.ToString();
}
private void button2_Click(object sender, EventArgs e)
{
if (richTextBox2.Text.Length == 0)
{
genKeys();
}
BigInteger p, q, exp;
BigInteger.TryParse(richTextBox1.Text, out p);
BigInteger.TryParse(richTextBox2.Text, out q);
BigInteger phi = (p - 1) * (q - 1);
BigInteger.TryParse(richTextBox3.Text, out exp);
NumberTheory myRsa = new NumberTheory();
if (myRsa.myGcd(exp, phi) != 1)
{
label4.Text = "GCD(E, PHI(N)) != 1 \n PLEASE SELECT ANOTHER E";
label4.ForeColor = Color.Red;
label4.TextAlign = System.Drawing.ContentAlignment.TopCenter;
label4.Visible = true;
return;
}
else
{
label4.Text = " GCD(E, PHI(N)) = 1";
label4.ForeColor = Color.Green;
label4.TextAlign = System.Drawing.ContentAlignment.TopCenter;
label4.Visible = true;
}
KeysPair keys = new KeysPair(p, q, exp);
var publicKey = keys.getPublicKey();
var privateKey = keys.getPrivateKey();
richTextBox4.Text = "Public key : {" + publicKey.Item1.ToString() + ", " + publicKey.Item2.ToString() + " }";
richTextBox5.Text = "Private key : {" + privateKey.Item1.ToString() + ", " + privateKey.Item2.ToString() + " }";
richTextBox4.Visible = true;
richTextBox5.Visible = true;
}